linux-kernel - [PATCH 4.14 003/107] video: fbdev: Set pixclock = 0 in goldfishfb

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Message-Id: <20190401170045.595711650@linuxfoundation.org>
Date:   Mon,  1 Apr 2019 19:01:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Peter Maydell <peter.maydell@...aro.org>,
        Roman Kiryanov <rkir@...gle.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 003/107] video: fbdev: Set pixclock = 0 in goldfishfb

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit ace6033ec5c356615eaa3582fb1946e9eaff6662 ]

User space Android code identifies pixclock == 0 as a sign for emulation
and will set the frame rate to 60 fps when reading this value, which is
the desired outcome.

Signed-off-by: Christoffer Dall <christoffer.dall@...aro.org>
Signed-off-by: Peter Maydell <peter.maydell@...aro.org>
Signed-off-by: Roman Kiryanov <rkir@...gle.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/video/fbdev/goldfishfb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/video/fbdev/goldfishfb.c
+++ b/drivers/video/fbdev/goldfishfb.c
@@ -234,7 +234,7 @@ static int goldfish_fb_probe(struct plat
 	fb->fb.var.activate	= FB_ACTIVATE_NOW;
 	fb->fb.var.height	= readl(fb->reg_base + FB_GET_PHYS_HEIGHT);
 	fb->fb.var.width	= readl(fb->reg_base + FB_GET_PHYS_WIDTH);
-	fb->fb.var.pixclock	= 10000;
+	fb->fb.var.pixclock	= 0;
 
 	fb->fb.var.red.offset = 11;
 	fb->fb.var.red.length = 5;